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Brightness is determined by lumens.
Led light output vs current. Warmer light in the 2700k range is way you d expect from a standard incandescent the k stands for kelvin. What about cfl bulbs. The light output of an led for a constant current varies as a function of its junction temperature. By driving led light sources with a regulated constant current power supply the light output variation and lifetime issues resulting from voltage variation and voltage changes can be eliminated.
Figure 9 shows the light output of several leds as a function of junction temperature. Simply take your current incandescent watts and select the corresponding led bulb equivalent on the lumens brightness scale. The temperature dependence is much less for ingan leds e g blue green white than for algainp leds e g red and yellow. Here is wattage in its proper place.
At low power levels the difference is even larger. Lumens is best described as the measurement of light. Choosing an led light bulb. Bright led flood lamps use only 11 to 12 watts while creating a light output comparable to a 50 watt incandescent bulb.
Older led chips found in older generation led bulbs from as recent as 2008 2010 produce less light per watt than the 2011 2012 led chips found in more modern led bulbs. For example a 3w led is equivalent in output to a 45 w incandescent. Also known as color temperature this indicates the quality of light ranging from warm yellow light to cool blue light. When choosing a bulb keep in mind the following.
A single cfl and led bulb might have the same lumen brightness output but vary greatly in the amount energy needed to generate that level of brightness. Another advantage of leds is the hassle factor leds last a lot longer than a regular bulb. Pay close attention to lumens since this number indicates the brightness or light output of the bulb. And with a shift to more energy efficient light.
Therefore constant current drivers are generally recommended for powering led light sources. Orbit marine ic dual pro led smart control. To save the most energy choose the bulb with the lowest wattage suitable for its usage. Read the package to choose desired illumination level.
In short led and cfl as technologies do not have a difference in brightness intrinsically.
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